> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.avada.io/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Why is undelivered SMS charged?

### When is an SMS marked as "Undelivered"? 

Sometimes, your message is mark as "Undelivered" because of the following common reasons: 

* The To number is unknown or no longer in service. 
* The 'To' number is unreachable - the device is likely powered down, out of the service area, or may not accept your messages.
* The destination carrier is filtering out your messages for delivery.
* Your message has been blocked from reaching the destination.
* The destination is a landline phone, or the destination carrier can't be reached.

### Why is undelivered SMS charged? 

When a message is sent successfully from our platform but is not received at the end user's handset, we're already charged by the carrier. Therefore, you will be charged for a message if delivery is attempted, i.e., the message status is "sent," "delivered," "undelivered," or "delivery unknown."